Spoil
what evidence supports sea-floor spreading at the mid-ocean ridge?
land & plant fossils found across oceans
land looks like puzzle pieces & glacier till in warm climates
matching magnetic strips & rock ages on both sides
similar rock structures on separate coastlines

Land & plant fossils found across oceans

Explanation:

Abundant proof supports the significant conflicts of the ocean bottom spreading hypothesis. To begin with, tests of the profound seafloor show that basaltic maritime outside and overlying dregs become dynamically younger as the mid-sea edge is drawn nearer, and the silt spread is more slender close to the side. Second, the stone making up the sea depths is impressively younger than the landmasses, without any examples found 200M years, as appeared differently concerning most significant times of more than 3B years for the mainland rocks.

because there are alot of mountains